static void Main(string[] args)
{
ICurrency currency;
double valueToCalculate;
double calculatedValue;
currency = new Dollar();
valueToCalculate = 5;
calculatedValue = currency.CalculateBRLQuote(valueToCalculate);
Console.WriteLine("{0} dolares = {1} reais", valueToCalculate, calculatedValue);
currency = new Euro();
valueToCalculate = 10;
calculatedValue = currency.CalculateBRLQuote(valueToCalculate);
Console.WriteLine("{0} Euros = {1} reais", valueToCalculate, calculatedValue);
currency = new Libra();
valueToCalculate = 20;
calculatedValue = currency.CalculateBRLQuote(valueToCalculate);
Console.WriteLine("{0} Libras = {1} reais", valueToCalculate, calculatedValue);
Console.ReadKey();
}